falco/userspace/engine/falco_source.h

// SPDX-License-Identifier: Apache-2.0
/*
Copyright (C) 2023 The Falco Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

#pragma once

#include <string>
#include "filter_ruleset.h"

/*!
	\brief Represents a given data source used by the engine.
	The ruleset of a source should be created through the ruleset factory
	of the same data source.
*/
struct falco_source
{
	falco_source() = default;
	falco_source(falco_source&&) = default;
	falco_source& operator = (falco_source&&) = default;
	falco_source(const falco_source& s):
		name(s.name),
		ruleset(s.ruleset),
		ruleset_factory(s.ruleset_factory),
		filter_factory(s.filter_factory),
		formatter_factory(s.formatter_factory) { };
	falco_source& operator = (const falco_source& s)
	{
		name = s.name;
		ruleset = s.ruleset;
		ruleset_factory = s.ruleset_factory;
		filter_factory = s.filter_factory;
		formatter_factory = s.formatter_factory;
		return *this;
	};

	std::string name;
	std::shared_ptr<filter_ruleset> ruleset;
	std::shared_ptr<filter_ruleset_factory> ruleset_factory;
	std::shared_ptr<gen_event_filter_factory> filter_factory;
	std::shared_ptr<gen_event_formatter_factory> formatter_factory;

	// Used by the filter_ruleset interface. Filled in when a rule
	// matches an event.
	mutable std::vector<falco_rule> m_rules;

	inline bool is_field_defined(const std::string& field) const
	{
		auto *chk = filter_factory->new_filtercheck(field.c_str());
		if (chk)
		{
			delete(chk);
			return true;
		}
		return false;
	}
};